According to the manufactures website Celafen is an “effective alternative” to non-steroidal anti-inflammatory drugs to manage daily pain.

Liz claims the cream has helped her quit taking most of her painkillers and “return to an almost normal life”.

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The painful condition causes stiffness and pain all over the body

Pop star Lady Gaga was forced to pull out of a concert in Brazil earlier this month.

The Born This Way singer shocked fans with the news she suffers from the chronic pain condition in her new Netflix documentary Gaga: Five Foot Two.

In the trailer for the documentary – which was filmed over eight months last year – Gaga can be seen wincing in pain as a physician works on her shoulder.

She first mentioned her battle back in November when she took to Instagram to say: “Having a frustrating day with chronic pain, but I find myself feeling so blessed to have such strong intelligent female doctors.

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Lady Gaga was forced to pull out of a concert in Brazil earlier this month because of her condition

On cancelling her Brazil concert she posted a picture on Instagram of her arm with a drip hanging out of it while she lay on a bed.

Also known as fibromyalgia syndrome (FMS), fibromyalgia is a long-term condition which causes pain all over the body.

As well as chronic pain, fibromyalgia can cause increased sensitivity to pain, fatigue and muscle stiffness, according to the NHS.

Sufferers can also have difficulty sleeping, as well as memory loss, concentration problems, headaches and irritable bowel syndrome.

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Lady Gaga shocked fans with the news she suffers from the chronic pain condition in her new Netflix documentary Gaga: Five Foot Two

The exact cause of fibromyalgia is unknown, but researchers believe it may be related to chemicals in the brain and could be affected by genes inherited from your parents.

There is no cure for fibromyalgia, although the symptoms can be controlled to make it easier to live with.

Exercise has been found to help ease many painful symptoms, while others find relaxation techniques can help keep the condition under control.

Treatment could include a combination of lifestyle changes, painkilling medication and counselling or another form of therapy, like CBT.